What action is taken with the control box during the HVAC procedure?

During the HVAC procedure, tagging and padlocking the control box is a critical safety measure. This action ensures that when work is being done on the HVAC system, unauthorized personnel cannot access or operate the system, which could lead to accidental exposure to hazardous conditions or equipment malfunctions. By securing the control box, workers can carry out their tasks without the risk of someone inadvertently turning the system back on or altering its settings while work is ongoing.

In high-risk environments like those involving asbestos, it’s essential to follow strict protocols to protect the workers and the public. Tagging and padlocking signal that the system should not be used until the work is completed and it's safe to return to operation. This practice is part of establishing a comprehensive lockout/tagout procedure that is vital for ensuring safety in accordance with established regulations.

Other options might suggest alternatives that do not provide the same level of safety and security. Keeping the control box labeled but accessible does not adequately protect workers, while turning it on to monitor air quality could pose hazards during maintenance. Dismantling the control box may disrupt system processes without ensuring proper safeguards are in place. Therefore, the action of tagging and padlocking is aligned with best practices for maintaining safety during HVAC procedures.